C#
VB
Java
WinRT C#
C++
Compresses or decompresses this RasterImage.
public void ChangeCompression(
RasterCompression compression
)
Public Sub ChangeCompression( _
ByVal compression As Leadtools.RasterCompression _
)
public void ChangeCompression(
Leadtools.RasterCompression compression
)
public void changeCompression(RasterCompression compression)
function Leadtools.RasterImage.ChangeCompression(
compression
)
public:
void ChangeCompression(
Leadtools.RasterCompression compression
)
compression
Indicates the type of compression to use on the image.
This method is available only in (Document/Medical only) toolkits.
For more information, refer to Speeding Up 1-Bit Documents.
This method does not support signed images.
This example toggles image compression.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using LeadtoolsExamples.Common;
using Leadtools.Svg;
public void ChangeCompressionTest()
{
// This method toggles image compression.
RasterCodecs codecs = new RasterCodecs();
// Load the image compressed
codecs.Options.Load.Compressed = true;
RasterImage image = codecs.Load(Path.Combine(ImagesPath.Path, "OCR1.TIF"));
String str = "BEFORE - ImageSize: " + image.DataSize + " bytes, Type: " + (image.IsCompressed ? "Compressed" : "UnCompressed");
Console.WriteLine(str, "ChangeCompression");
image.ChangeCompression((image.IsCompressed == true) ? RasterCompression.None : RasterCompression.Rle);
str = "AFTER - ImageSize: " + image.DataSize + " bytes, Type: " + (image.IsCompressed ? "Compressed" : "UnCompressed");
Console.WriteLine(str, "ChangeCompression");
// Load the image super-compressed
codecs.Options.Load.SuperCompressed = true;
image = codecs.Load(Path.Combine(ImagesPath.Path, "IMAGE1.CMP"));
str = "BEFORE - ImageSize: " + image.DataSize + " bytes, Type: " + (image.IsSuperCompressed ? "Compressed" : "UnCompressed");
Console.WriteLine(str, "ChangeCompression");
image.ChangeCompression((image.IsSuperCompressed == true) ? RasterCompression.None : RasterCompression.Super);
str = "AFTER - ImageSize: " + image.DataSize + " bytes, Type: " + (image.IsSuperCompressed ? "Compressed" : "UnCompressed");
Console.WriteLine(str, "ChangeCompression");
image.Dispose();
codecs.Dispose();
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Controls
Imports Leadtools.Dicom
Imports Leadtools.Drawing
Imports Leadtools.Svg
Public Sub ChangeCompressionTest()
' This method toggles image compression.
Dim codecs As RasterCodecs = New RasterCodecs()
' Load the image compressed
codecs.Options.Load.Compressed = True
Dim image As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "OCR1.TIF"))
Dim str As String
If image.IsCompressed Then
str = "BEFORE - ImageSize: " & image.DataSize & " bytes, Type: " & ("Compressed")
Else
str = "BEFORE - ImageSize: " & image.DataSize & " bytes, Type: " & ("UnCompressed")
End If
Console.WriteLine(str, "ChangeCompression")
If (image.IsCompressed = True) Then
image.ChangeCompression(RasterCompression.None)
Else
image.ChangeCompression(RasterCompression.Rle)
End If
If image.IsCompressed Then
str = "AFTER - ImageSize: " & image.DataSize & " bytes, Type: " & ("Compressed")
Else
str = "AFTER - ImageSize: " & image.DataSize & " bytes, Type: " & ("UnCompressed")
End If
Console.WriteLine(str, "ChangeCompression")
' Load the image super-compressed
codecs.Options.Load.SuperCompressed = True
image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP"))
If image.IsSuperCompressed Then
str = "BEFORE - ImageSize: " & image.DataSize & " bytes, Type: " & ("Compressed")
Else
str = "BEFORE - ImageSize: " & image.DataSize & " bytes, Type: " & ("UnCompressed")
End If
Console.WriteLine(str, "ChangeCompression")
If (image.IsSuperCompressed = True) Then
image.ChangeCompression(RasterCompression.None)
Else
image.ChangeCompression(RasterCompression.Super)
End If
If image.IsSuperCompressed Then
str = "AFTER - ImageSize: " & image.DataSize & " bytes, Type: " & ("Compressed")
Else
str = "AFTER - ImageSize: " & image.DataSize & " bytes, Type: " & ("UnCompressed")
End If
Console.WriteLine(str, "ChangeCompression")
image.Dispose()
codecs.Dispose()
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
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